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Enhanced electrochemical performances of Na-doped cathode material LiNi.sub.1/3Co.sub.1/3Mn.sub.1/3O.sub.2 for lithium-ion batteries.(Energy Materials)

Li, Yonghu ; Liu, Jingya ; Lei, Yike ; Lai, Chunyan ; Xu, Qunjie

Journal of Materials Science, 2017, Vol.52(23), p.13596(10) [Tạp chí có phản biện]

ISSN: 0022-2461 ; DOI: 10.1007/s10853-017-1449-z

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  • Nhan đề:
    Enhanced electrochemical performances of Na-doped cathode material LiNi.sub.1/3Co.sub.1/3Mn.sub.1/3O.sub.2 for lithium-ion batteries.(Energy Materials)
  • Tác giả: Li, Yonghu ; Liu, Jingya ; Lei, Yike ; Lai, Chunyan ; Xu, Qunjie
  • Chủ đề: X-Ray Spectroscopy ; X-Ray Diffraction ; Transmission Electron Microscopes ; Electrochemistry
  • Là 1 phần của: Journal of Materials Science, 2017, Vol.52(23), p.13596(10)
  • Mô tả: The Na-doped layer-structured Li.sub.1-xNa.sub.xNi.sub.1/3Co.sub.1/3Mn.sub.1/3O.sub.2 (x = 0, 0.01, 0.03, 0.05, 0.07) cathode materials for lithium-ion batteries have been successfully synthesized by co-precipitation reaction combined with solid-state sintering method. The structure and morphologies of cathode materials Li.sub.1-xNa.sub.xNi.sub.1/3Co.sub.1/3Mn.sub.1/3O.sub.2 (x = 0, 0.01, 0.03, 0.05, 0.07) were measured by the powder X-ray diffraction, a field emission scanning electron microscope, energy-dispersive spectrometer, energy-dispersive X-ray spectroscopy and transmission electron microscope. The electrochemical performances were measured by galvanostatic charge-discharge test at different rates, electrochemical impedance spectroscopy and cyclic voltammetry. Compared with pristine sample, the Na-doped cathode materials have higher discharge specific capacity, more excellent cycling stability and better rate performance. The sample of Li.sub.0.95Na.sub.0.05Ni.sub.1/3Co.sub.1/3Mn.sub.1/3O.sub.2 has the most excellent electrochemical performances. It exhibits 204.5 m Ahg.sup.-1 initial discharge specific capacity and 87.2% capacity retention after 30 cycles at 0.1 C in the voltage range of 3.0-4.8 V. While the pristine LiNi.sub.1/3Co.sub.1/3Mn.sub.1/3O.sub.2 material illustrates 187.1 m Ahg.sup.-1 initial discharge specific capacity and 78.4% capacity retention after 30 cycles at 0.1 C in the voltage range of 3.0-4.8 V.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461 ; DOI: 10.1007/s10853-017-1449-z

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